Quick opening cock



FIG. 1 is a front perspective view of the quick opening cock showing my new design.

FIG. 2 is a front view;

FIG. 3 is rear view;

FIG. 4 is a side view from one side;

FIG. 5 is a side view from the other side;

FIG. 6 is a top view; and,

FIG. 7 is bottom view. 

I claim the ornamental design for a quick opening cock, as shown and described. 